Titanium Lower Element, 4500W

Rheem SP213670 Titanium Fold-Back Lower Element – 240V, 4500W, Low Watt Density

The Rheem SP213670 is a factory-specified titanium lower heating element designed for use in select Rheem and Ruud electric water heaters. This 4500-watt, 240-volt element features a low watt density configuration and a fold-back design for improved heat transfer and scaling resistance. Built with a titanium sheath, this element is engineered for superior corrosion resistance, especially in high-mineral or aggressive water conditions.

Professional Application

This element is intended as a direct replacement for models originally equipped with titanium elements. It provides enhanced service life in systems where standard copper or stainless steel elements may degrade prematurely. For contractors servicing electric tank-type units in residential or light commercial applications, the SP213670 offers a reliable, long-life solution that maintains OEM performance specifications.

Performance Features

• Element Type: Fold-back low watt density design reduces surface temperature to minimize scale accumulation and extend element life
• Sheath Material: Titanium – offers maximum corrosion resistance and compatibility with aggressive water chemistry
• Wattage: 4500 watts
• Voltage: 240 volts (single phase)
• Cold Resistance: 13.3 ohms
• Mounting Style: Standard screw-in with 1" NPSM thread
• Gasket: EPDM rubber gasket included for leak prevention at the tank flange

Installation Notes

Installation requires draining the tank and replacing the existing lower element with a wrench-compatible tool (1½" hex socket recommended). For safety and code compliance, ensure the power is fully disconnected prior to servicing. Installation by a licensed plumber or electrician is recommended, especially in commercial or inspected settings.

Specifications Summary

• Rheem Part Number: SP213670
• Element Configuration: Fold-back, titanium
• Watt Density: Low (LWD)
• Connection: 1" NPSM threaded base
• Replacement For: Rheem/Ruud hybrid and electric models with titanium lower elements

Applications

• Direct replacement in Rheem electric water heaters requiring titanium elements
• Recommended for systems exposed to hard or acidic water
• Used in hybrid electric heat pump units with enhanced corrosion protection requirements

Benefits for Contractors

• Extended Service Life: Low watt density and titanium construction reduce premature element failure
• OEM Compatibility: Designed to meet Rheem’s original specifications, preserving performance and warranty compliance
• Efficient Heat Transfer: Fold-back design optimizes surface area without increasing tank intrusion

Note: Always verify compatibility using model and serial number reference or official Rheem documentation before ordering.